Circuit Upgrades and new IP from WAN provider

[NILEONE]

I am in the process of a circuit upgrade, and i have been assigned new external usable IP addresses by our WAN provider. Can anyone share if they have also done something like that and what problems to watch out for ? Also if they are any tips or tricks on how to go about doing this. 

[PhilipDAth]

Nothing tricky involved.  I tend to configure 1:1 NAT (as my first choice) but you can also do 1:many NAT.

https://documentation.meraki.com/MX/NAT_and_Port_Forwarding/Port_Forwarding_and_NAT_Rules_on_the_MX#...

[DarrenOC]

Should be a straight forward process to migrate from one batch of external IPs to your new allocation.  Note your existing settings on your MX, NAT rules etc then amend to the new.

[Dunky]

If your external IP is changing the other thing to watch out for is if you communicate with any 3rd parties that may have whitelisted your current IP.

I had this issue where we SFTP data to a third party and I hab to get them to update their firewall for our new IP address.